Collar for glass lamps.



E. W. BRYCE.

COLLAR FOR GLASS LAMPS.

APPLIOATION FILED MAY 12,1910.

1,003,699. Pa ented Sept 19,1911.

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UNITED STATES PATENT OFFICE.

EDWIN W. BRYCE, OF PITTSBURG, PENNSYLVANIA.

COLLAR FOR GLASS LAMPS. .1

To all whom it may concern:

Be it known that I, EDWIN IV. Baron, a resident of Pittsburg, in thecounty of Allegheny and State of Pennsylvania, have invented certain newand useful Improvements in Collars for Glass Lamps, of which thefollowing is a specification.

The object of this invention is to provide eflicient and durableburner-holding means for glass lamps.

While various substitutes have been proposed for the familiar cementedcollar, the latter is still almost universally used though decidedlyobjectionable for various reasons. One is the danger of the collarbecoming loose under the considerable weight of the burner, chimney andshade, and permitting the latter to fall and break and endanger thepremises by fire. And even though the cemented collar may not lose itshold entirely, the cement is liable to open and create a leak.Furthermore, the cementing of these collars involves considerable timeand expense. With the present invention I overcome all of thesedifliculties by providing what may be termed a two-part collar, theinner part, which is in fact a bushing, being cast in the glass lampdurin the process of molding the same, making it substantially integraltherewith. These parts or fittings are usually formed of sheet brass,and as the inner'or bushing part is cast in the lamp it must passthrough the leers in the annealing process, sand the heat destroys itsluster or burnish. But as the neck and the cast-in bushing are inclosedby the outer member of the collar, or the collar proper, applied afterthe lamp has been annealed, the external appearance is the same asthough the collar were cemented in the usual way. The outer member, orcollar proper, simply provides a conventional finish for the lamp neck,and as it sustains no Weight it may be loosely applied and is thusreadily removable for the purpose of thoroughly cleaning the lamp,though of course it may be cemented or otherwise permanently secured ifdesired.

In the accompanying drawings, Figure 1 illustrates the body and neckportion of a lamp provided with the improvement, the same shown partlyin elevation and partly in section. Fig. 2 is a similar view of the lampneck with the outer member or collar f 55 proper removed, and Fig. 3 isa like view Specification of Letters Patent.

Application filed May 12, 1910.

Patented Sept. 19, 1911.

Serial No. 560,873.

of the outer collar, while Fig. 4 is a similar view of the inner collarmember or bushing.

Referring to the drawings, 2 is the lamp body or oil reservoir of aglass lamp, and 3 the integral neck. The fittings for the neck may be ofsheet brass and are preferably formed in two parts, the inner part 4being of ring-like form, in effect a bushing, which is corrugated toform the usual internal burner-attaching threads 5, the corrugationappearing in the outer surface of the bushing, as indicated at 6. Duringthe forming operation neck portion 3 thereof is cast around the bushing4, the latter being sustained in the mold in any suitable manner. Underthe casting pressure the glass forms in and around the corrugations 6,

and thus obtains such a hold as to make the' bushing and neckpractically integral. The lower edge of bushing 4 may be shaped with theout-turned annular lip 7 which becomes embedded in the glass, as shownin Figs. 1 and 2, and the upper edge 8 may be similarly projected overthe top surface of neck 3. Lip 7 increases the hold of the glass on thebushing, and furthermore precludes removing the bushing by screwing itout of neck 3. Also, with said lip a smooth rounded edge is formed atthe lower end of the bushing which will not catch the wick or cleaningcloths inserted through the neck, and it also prevents oil and dirt fromworking up behind the bushing. The out-turned upper edge 8 also avoidsthe formation of a sharp edge at the top of the screw threads, andaffords a flat surface finish for the top face of neck 3.

The collar proper 9 fits down over neck 3,

being provided with the usual flange 10 to fit the body at the base ofthe neck, and is also preferably formed with the inturned top edge orlip 11 which fits down on the neck, in the present instance overlappingedge 8 of bushing Collar 9 may be permanently secured by cement or othermeans, or it may remain loose and be removed whenever the burner istaken off so that both the collar and the lamp neck may be thoroughlycleaned.

As bushing 4: is cast in the lamp body during the molding operation, itis of course in place while the lamp is being annealed, so that ifformed of brass, as it usually is, its surface finish or burnish isdestroyed, but as the whole neck is inclosed by collar 9 applied afterthe lamp has been annealed, the bushing is not exposed, and the factthat its surfaces are not bright is of no consequence.

It will be understood that the means here shown ,for forming aninterlocking connection between the bushing and the glass lamp body isonly one of numerous adaptations of the broad idea of casting, andthereby securely holding, a burner attaching device in place. And Whilethe outer collar 9 will usualy be employed, as it adds greatly to theappearance oi the lamp, it is ornamental merely and may be dispensedwith if desired.

I claim 1. As a new article of manufacture, a glass lamp having a neckcast integral therewith, and a burner holding device around which theneck is formed and to which it is permanently united by the cast-ingpressure to which the neck is subjected.

2. As a new article of manufacture, a glass lamp having a neck castintegral therewith, and a threaded burner-holding bushing around whichthe neck is formed and to which it is permanently united by the castingpressure to which the neck is subjected.

3. As a new article of manufacture, a glass lamp having a neck castintegral therewith, and an internally threaded externally indentedburner-holding bushing permanently embedded in the neck by the castingpressure to which the neck is subjected.

4. As a new article of manufacture, a glass lamp having a neck castintegral therewith, and a threaded burner-holding bushing around whichthe neck is formed and to which it is permanently united by the castingpressure to which the neck is subjected, the extremity of the bushinghaving an annular outwardly projecting lip flush with the top extremityof the cast neck.

In testimony whereof I affix my signature in presence of two witnesses.

EDWIN WV. BRYCE.

Witnesses:

J. M. NESBIT, F. E. GAITHER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

